Ac Motor Vfd System For Energy Saving - India

Two general areas where VFDs can recover wasted energy: (regenerative

applications) are:

Cyclical applications.

Braking applications.

A centrifuge is a good example of a cyclical application that generates inertial energy that, normally wasted, can be recovered with a VFD.

Cyclical Applications.

In this context, cyclical refers to applications in which the machine comprises of a large inertial load (for example, centrifuges, and punch presses with large flywheels).

These mechanisms are required to coast to a certain speed or return to a set state.

While coasting or returning to the set state, a large amount of inertial energy generated is simply wasted.

With a regenerative VFD this energy can be recovered and returned to the facility power grid for use in other areas.

Braking Applications.

Braking here refers to electrical braking, more commonly referred to as dynamic braking.

These types of applications are known as holding torque applications.

As the word braking implies, the load is either slowed down to maintain a certain speed or it is completely stopped.

For example, in the mining industry, downhill conveyors must have some method of maintaining their speed, for obvious reasons.

An escalator is a similar type of application.

Company Contact:

• Posted By: VFD Manufacturer

• Phone: 912267059033

• Address: Daffodil, Sepal, Sama Savli Road, Behind Gangotri, Baroda Gujarat, India

• Email:

• Website: http://www.vfds.in/

• Business Description: VFDs.
  
  in Variable Frequency Drive used to control a motor's speed or
  
  torque can net substantial energy savings.
  
  But VFDs, also known as
  
  adjustable speed drives and variable speed drives (VSD), can induce
  
  unwanted motor shaft voltages.
  
  A maintenance free, long life shaft
  
  grounding ring that protects attached equipment as well as the motor's
  
  bearings is warranted.
  
  Bearing protection for induction motors
  
  A bearing protection ring is available for any NEMA or IEC motor size.
  
  It can be factory installed inside new motors or quickly and easily retrofitted even in the field using conductive epoxy (at right).
  
  VFD, used to control a motor's speed or torque, can net substantial savings in energy costs, up to 30 percent.
  
  Because of this, they have been cited as a key technology to make industrial HVAC systems, automated assembly lines, and other processes more energy efficient.
  
  But VFD, also known as variable speed drives (VSD) and ac drives, can induce unwanted motor shaft voltages.
  
  Without effective mitigation, these electrical discharges can destroy bearings, causing premature motor failure.
  
  In fact, the costly repair or replacement of failed motor bearings can wipe out any savings that an AC drive yields and severely diminish the reliability of an entire motor driven system.
  
  And when a VFD controlled motor fails, warranty claims against motor and VFD manufacturers may not pan out.
  
  Because systems that use VFDs are so varied, the liability question is a hot potato.